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3 years ago

Do I add on both sides ? Help ??

Mathematics

2 answers:

vazorg [7]3 years ago

8 0

You should multiply when you see a dot between two digits and I have done the same you see the image that Ihave sent to you the answer for your question is in that image

vfiekz [6]3 years ago

7 0

isolate the variable (x). what is on the same side as the variable? what is its operation (you need to do the opposite operation)?

-10 = 2x (the variable is being multiplied by 2. undo multiplication with division)

-10/2 = 2x/2

-5 = x

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Doug hits a baseball straight towards a 15 ft high fence that is 400 ft from home plate. The ball is hit 2.5ft above the ground

Scorpion4ik [409]

Answer:

$125.4\ \text{m/s}$

Step-by-step explanation:

u = Initial velocity of baseball

$\theta$ = Angle of hit = $30^{\circ}$

x = Displacement in x direction = 400 ft

y = Displacement in y direction = 15 ft

$y_0$ = Height of hit = 2.5 ft

$a_y$ = g = Acceleration due to gravity = $32.2\ \text{ft/s}^2$

t = Time taken

Displacement in x direction

$x=u_xt\\\Rightarrow x=u\cos\theta t\\\Rightarrow t=\dfrac{x}{u\cos\theta}\\\Rightarrow t=\dfrac{400}{u\cos30^{\circ}}\\\Rightarrow t=\dfrac{400}{u\dfrac{\sqrt{3}}{2}}\\\Rightarrow t=\dfrac{800}{u\sqrt{3}}$

Displacement in y direction

$y=y_0+u_yt+\dfrac{1}{2}a_yt^2\\\Rightarrow y=y_0+u\sin\theta t+\dfrac{1}{2}a_yt^2\\\Rightarrow 15=2.5+u\sin30^{\circ}(\dfrac{800}{u\sqrt{3}})+\dfrac{1}{2}\times -32.2\times (\dfrac{800}{u\sqrt{3}})^2\\\Rightarrow \dfrac{400}{\sqrt{3}}-\dfrac{10304000}{3u^2}-12.5=0\\\Rightarrow 218.44=\dfrac{10304000}{3u^2}\\\Rightarrow u=\sqrt{\dfrac{10304000}{3\times218.44}}\\\Rightarrow u=125.4\ \text{m/s}$

The minimum initial velocity needed for the ball to clear the fence is $125.4\ \text{m/s}$

5 0

3 years ago

NEED ANSWER ASAP WILL GIVE BRAINLIEST FOR CORRECT ANSWER

coldgirl [10]

Answer:

y = 500x + 5000

Step-by-step explanation:

7 0

3 years ago

Simplify 500 to the nearest common factor

irina1246 [14]

Answer:

1/2

Step-by-step explanation:

Factor both the numerator and denominator down to prime factors:

500 = 22 * 53

1,000 = 23 * 53

Calculate the greatest common factor, GCF (also called greatest common divisor, GCD), by taking all the common prime factors of the numerator and denominator, by the lowest exponents:

gcd (22 * 53; 23 * 53) = 22 * 53

Divide both the numerator and denominator by their greatest common factor, GCF (also called the greatest common divisor, GCD):

500/1,000 =

(22 * 53)/(23 * 53) =

((22 * 53) ÷ (22 * 53)) / ((23 * 53) ÷ (22 * 53)) =

1/2

Rewrite result:

1 ÷ 2 = 0.5 as a decimal number.

Hope this helps!!

7 0

3 years ago

Which of the following is NOT a requirement for testing a claim about two population standard deviations or variances? A. The p

lara [203]

Answer:

B. One of the populations is normally distributed.

Step-by-step explanation:

To test a claim about two population standard deviation or variance, it is imperative that the data meets certain requirements which include :

Randomness : Data must not be biased as such it must be drawn as a random sample from a larger group.

The data must be independent. That is not related to one another, the outcome of one should not rely on the outcome or value of another.

Both groups must be drawn From a population which is normally distributed.

One group being normally distributed by stribuyed while the other isn't a requirement for hypothesis testing in this scenario.

6 0

3 years ago

Write the equivalent ratios for the following: a) 12/20 b) 15/25 c) 18/40 d) 45/90

professor190 [17]

Answer:

45/90

Step-by-step explanation:

45 times 2 = 90

BRAINLIEST PLEASE

8 0

3 years ago